Sorry for the delay, I was on vacation and only now did I get GMS2 working on Linux. I'll now actually fix these issues.
While I'm at it, do any of you have game design suggestions? I'm really unsure about the quality of the levels I designed...
I like the existing levels; it would be awesome to have additional levels or sandbox mode where one could use the “peripherals” described in the manual.
Oh yeah, I meant to add those at some point actually... maybe now's a good time xD